[submodule] Update submodule sonic-gnmi to the latest HEAD automatically (#15929)

#### Why I did it
src/sonic-gnmi
```
* fb338d5 - (HEAD -> master, origin/master, origin/HEAD) Merge pull request #135 from liuh-80/dev/liuh/cherry-pick-zmq (3 hours ago) [Hua Liu]
* f8d9c7e - Merge branch 'master' into dev/liuh/cherry-pick-zmq (8 hours ago) [Qi Luo]
* cbd5185 - Fix PR comments (26 hours ago) [liuh-80]
* 226fc31 - Fix PR comments (2 days ago) [liuh-80]
* 6579847 - Fix UT (3 days ago) [liuh-80]
* 53713c3 - Improve code coverage (3 days ago) [liuh-80]
* d8ff562 - Fix UT (3 days ago) [liuh-80]
* c3a66bc - Cherry-pick ZMQ change from nvidia repo (3 days ago) [liuh-80]
```
#### How I did it
#### How to verify it
#### Description for the changelog
This commit is contained in:
mssonicbld 2023-07-21 16:32:44 +08:00 committed by GitHub
parent 287056110e
commit 19638a4df6
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23

@ -1 +1 @@
Subproject commit 610509b3cc610af9373110e33dec807a8f9b7e11
Subproject commit fb338d50aad1e78d2b675000c916c5b5fdecfc0e